<?xml version="1.0"?>
<xs:schema
    targetNamespace="urn:ietf:params:xml:ns:geopriv:held"
    xmlns:xs="http://www.w3.org/2001/XMLSchema"
    xmlns:held="urn:ietf:params:xml:ns:geopriv:held"
    xmlns:xml="http://www.w3.org/XML/1998/namespace"
    elementFormDefault="qualified"
    attributeFormDefault="unqualified">

  <xs:annotation>
    <xs:documentation>
      This document (RFC-ietf-geopriv-http-location-delivery-16) defines HELD messages.
    </xs:documentation>
  </xs:annotation>

  <xs:import namespace="http://www.w3.org/XML/1998/namespace"/>

  <!-- Return Location -->
  <xs:complexType name="returnLocationType">
    <xs:complexContent>
      <xs:restriction base="xs:anyType">
        <xs:sequence>
          <xs:element name="locationURI" type="xs:anyURI"
                      maxOccurs="unbounded"/>
        </xs:sequence>
        <xs:attribute name="expires" type="xs:dateTime"
                      use="required"/>
      </xs:restriction>
    </xs:complexContent>
  </xs:complexType>

  <!-- responseTime Type -->
  <xs:simpleType name="responseTimeType">
    <xs:union>
      <xs:simpleType>
        <xs:restriction base="xs:token">
          <xs:enumeration value="emergencyRouting"/>
          <xs:enumeration value="emergencyDispatch"/>
        </xs:restriction>
      </xs:simpleType>
      <xs:simpleType>
        <xs:restriction base="xs:nonNegativeInteger">
          <xs:minInclusive value="0"/>
        </xs:restriction>
      </xs:simpleType>
    </xs:union>
  </xs:simpleType>

  <!-- Location Type -->
  <xs:simpleType name="locationTypeBase">
    <xs:union>
      <xs:simpleType>
        <xs:restriction base="xs:token">
          <xs:enumeration value="any"/>
        </xs:restriction>
      </xs:simpleType>
      <xs:simpleType>
        <xs:restriction base="held:locationTypeList">
          <xs:minLength value="1"/>
        </xs:restriction>
      </xs:simpleType>
    </xs:union>
  </xs:simpleType>

  <xs:simpleType name="locationTypeList">
    <xs:list>
      <xs:simpleType>
        <xs:restriction base="xs:token">
          <xs:enumeration value="civic"/>
          <xs:enumeration value="geodetic"/>
          <xs:enumeration value="locationURI"/>
        </xs:restriction>
      </xs:simpleType>
    </xs:list>
  </xs:simpleType>

  <xs:complexType name="locationTypeType">
    <xs:simpleContent>
      <xs:extension base="held:locationTypeBase">
        <xs:attribute name="exact" type="xs:boolean"
                      use="optional" default="false"/>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>

  <!-- Message Definitions -->
  <xs:complexType name="baseRequestType">
    <xs:complexContent>
      <xs:restriction base="xs:anyType">
        <xs:sequence/>
        <xs:attribute name="responseTime" type="held:responseTimeType"
                      use="optional"/>
        <xs:anyAttribute namespace="##any" processContents="lax"/>
      </xs:restriction>
    </xs:complexContent>
  </xs:complexType>

  <xs:complexType name="errorType">
    <xs:complexContent>
      <xs:restriction base="xs:anyType">
        <xs:sequence>
          <xs:element name="message" type="held:errorMsgType"
                      minOccurs="0" maxOccurs="unbounded"/>
          <xs:any namespace="##other" processContents="lax"
                  minOccurs="0" maxOccurs="unbounded"/>
        </xs:sequence>
        <xs:attribute name="code" type="xs:token"
                      use="required"/>
        <xs:anyAttribute namespace="##any" processContents="lax"/>
      </xs:restriction>
    </xs:complexContent>
  </xs:complexType>

  <xs:complexType name="errorMsgType">
    <xs:simpleContent>
      <xs:extension base="xs:token">
        <xs:attribute ref="xml:lang"/>
        <xs:anyAttribute namespace="##any" processContents="lax"/>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>
  <xs:element name="error" type="held:errorType"/>

  <!-- Location Response -->
  <xs:complexType name="locationResponseType">
    <xs:complexContent>
      <xs:restriction base="xs:anyType">
        <xs:sequence>
          <xs:element name="locationUriSet"
                      type="held:returnLocationType"
                      minOccurs="0"/>
          <xs:any namespace="##other" processContents="lax"
                  minOccurs="0" maxOccurs="unbounded"/>
        </xs:sequence>
      </xs:restriction>
    </xs:complexContent>
  </xs:complexType>

  <xs:element name="locationResponse"
              type="held:locationResponseType"/>


  <!-- Location Request -->

  <xs:complexType name="locationRequestType">
    <xs:complexContent>
      <xs:extension base="held:baseRequestType">
        <xs:sequence>
          <xs:element name="locationType"
                      type="held:locationTypeType"
                      minOccurs="0"/>
          <xs:any namespace="##other" processContents="lax"
                  minOccurs="0" maxOccurs="unbounded"/>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>

  <xs:element name="locationRequest"
              type="held:locationRequestType"/>

</xs:schema>